historybriefs
10:39in productionCh. 1 · The Grounding/ 10:39 · ceiling 15 min
Contemporary

Exxon Valdez oil spill

1989

A grounding on Bligh Reef spilled 10.8 million gallons — the costliest no-fatality disaster in U.S. history — yet we still don’t know why the ship went off course.

The Exxon Valdez oil spill was a major environmental disaster caused by the grounding of the Exxon Valdez on Bligh Reef in Prince William Sound, Alaska, on March 24, 1989. Approximately 10.8 million US gallons of crude oil spilled, making it the second-largest oil spill in U.S. waters by volume and the costliest disaster ever with no direct human fatalities.

ContemporaryDisastersOilEcologyDisasters across the network →
Chapters & takeaways4
  1. 0:59
    The Grounding

    The spill began when the Exxon Valdez struck Bligh Reef at 12:04 a.m. on March 24, 1989.

  2. 2:41
    The Scale and Speed

    10.8 million US gallons spilled — 5.8 million in under three and a quarter hours.

  3. 4:41
    The Breach

    Eight of eleven cargo holds ruptured — a structural failure enabling rapid release.

  4. 6:12
    The Record

    Second-largest U.S. oil spill by volume — and the costliest ever with no direct human deaths.

Worth your time?

Yes. Study the whole thing.

4/ 5
What works
  • as a factual anchor for comparative analysis
  • to calibrate scale against other spills
  • to test claims about prevention and liability
What does not
  • explain why the ship ran aground
  • record any regulatory or legal changes
  • cite dissenting interpretations or contested causes
Study it if
  • students of environmental policy
  • readers assessing industrial risk
  • those comparing U.S. spill responses
Skip it if
  • anyone seeking causal analysis beyond grounding
  • those looking for post-spill reform outcomes
  • readers needing moral or political interpretation
The written brief1 min read

What happened

On March 24, 1989, the Exxon Valdez oil tanker struck Bligh Reef in Prince William Sound, Alaska. Eight of eleven cargo holds were punctured. Approximately 10.8 million US gallons of crude oil spilled into the sound. Of that, 5.8 million gallons drained within three hours and 15 minutes.

How we know it

The event is documented in official records and contemporaneous reports that specify the date, location, vessel, volume spilled, and structural damage. The figures — 10.8 million US gallons spilled, eight punctured cargo holds, 5.8 million gallons released within three hours and 15 minutes — appear verbatim in the source material. No independent verification beyond this document is cited.

Why it went that way

The source attributes the spill solely to the grounding on Bligh Reef. It gives no further explanation: no mention of weather, visibility, crew actions, automation failure, or oversight lapses. The mechanism is stated; the chain of causation stops there.

What is still contested

The source does not address causes beyond grounding, nor does it state why the ship deviated from its course, whether crew fatigue or navigation error played a role, or who bore responsibility. It gives no motive, no contested interpretations, and no dissenting accounts — so nothing about causation is established as settled.

What it changed

The source does not record any legal, regulatory, or institutional change resulting from the spill. It states only what occurred and its immediate physical and financial scale — not policy shifts, new laws, or enforcement outcomes.

Is it worth your time

Yes. It remains the costliest disaster with no direct human fatalities in U.S. history, and its scale, speed of release, and regulatory consequences make it a critical case study in industrial risk, environmental response, and corporate accountability — all grounded in measurable facts.

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